by steps
000000 000000
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df8070
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d3806a
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c78165
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a38355 a38355
a38355
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97834f 97834f
97834f
ff7f00 ff7f00
ff7f00
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ff7f7f
ff7fff ff7fff
ff7fff
8b844a 8b844a
8b844a
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
808545 808545
808545